The numbness of the patient’s left hand and foot may be a precursor of cerebrovascular disease, or it may be a tumor in the brain, the effect of occupational compression, and it may be caused by peripheral nerve disease, which should be judged according to the patient’s morbidity form: 1. If the problem of numbness of the patient’s left hand and foot appears suddenly, it should be considered as a precursor of acute cerebrovascular disease, which may be cerebral hemorrhage, transient ischemic attack, cerebral infarction type of disease, and must It is necessary to promptly consult a hospital, improve the head CT examination, and treat the cause of the disease. These patients usually have risk factors for cerebrovascular disease, such as hypertension, diabetes, hyperlipidemia, long-term smoking, alcohol and other bad habits, prone to cerebrovascular disease. 2, consider the brain tumor, occupying problems caused by the patient’s left hand and foot numbness symptoms will gradually appear, and continued progress aggravated, need to do head CT or MRI examination to clarify. 3, the left hand and foot numbness The symptoms may also be the precursors of peripheral nerve diseases, such as diabetes leading to peripheral neuritis problems, will also appear episodes of limb numbness symptoms.